20505080

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4703}}^1$

素因数の和:4823

約数の個数: 32

約数和(自身を含む): 46569600

約数和(自身を除く): 26064520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 4703, 9406, 18812, 23515, 37624, 47030, 94060, 188120, 512627, 1025254, 2050508, 2563135, 4101016, 5126270, 10252540, 20505080]

約数ペア:

[(1, 20505080), (2, 10252540), (4, 5126270), (5, 4101016), (8, 2563135), (10, 2050508), (20, 1025254), (40, 512627), (109, 188120), (218, 94060), (436, 47030), (545, 37624), (872, 23515), (1090, 18812), (2180, 9406), (4360, 4703)]